The biggest disappointment has to be Isner who had virtually zero points to defend. Despite a title in Auckland, he retired in the first round of the Australian Open and only moved from #14 to #13 in three weeks. But hey, Querrey is back in the top 50 and Donald Young finally gets us a third player in the top 80 by being the last standing American in Australia. Tim Smyczek went for the #3 ranked American to the #7 guy in a hurry. The real ascension is with Klahn who won another challenger in Maui (pictured) and continues to climb up the rankings. And then there's Harrison, somehow now down to 121. There is just no explanation for that.

Also worth noting that Eric Butorac is back up 14 spots to #34 in doubles and now the #3 ranked American again thanks to his finals run in Australia.

That's the update. It's Davis Cup week and we take on the Brits in San Diego starting Friday, so more soon!